Object: Open cluster NGC 6645                   Constell: SGR

RA: 18h 32.6m           Decl: -16° 54'          Epoch: 2000
Mag: 8.5m               Size: 10'               Type: III 1 m 

Observer: Jere Kahanpää
Obs. place: Helsinki, Finland
Date/Time: 15./16.9.1996, 22.15

Telescope: C 200/2000
Magn: 80x               Filter:
Field: 37'              NE Lim.mag: 5.4m
Background sky: 4       Seeing: 3-4
Weather: +5 °C, no Moon.           

Brightness: 4           Alt: 8° 
Description: A faint cluster (at least from 60° N lat.) of many
stars. A few of magnitude 11 and about 30 stars mag. 12-13.
Diam. 7'. Amorphous but irregular with several indefinite chains
of stars.